XK0-006 System Management Practice Question
A Linux administrator needs to change the permissions of a file to be readable and writable by the owner, readable by the group, and no access for others. Which command accomplishes this?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
chmod 640 file
The octal representation 640 sets owner read/write (6), group read (4), and others none (0).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
chmod 600 file
Why it's wrong here
600 gives owner rw, group none, others none.
- ✗
chmod 664 file
Why it's wrong here
664 gives owner rw, group rw, others r.
- ✗
chmod 644 file
Why it's wrong here
644 gives owner rw, group r, others r.
- ✓
chmod 640 file
Why this is correct
Correct: 640 gives owner rw, group r, others none.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-006 exam.